.nav-footer {
    background-color: #fff;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    box-shadow: 0px 0px 0px 1px #e1e1e1;
    ul {
      height: 50px;
      padding-top: 6.5px;
      li {
        float: left;
        text-align: center;
        width: 25%;
        i {
          display: block;
          font-size: 20px;
        }
        span {
          font-size: 12px;
        }
      }
    }
  }
  .active{
      color:orange;
  }
  